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Question: iMac 2009 upgrade to Sierra or High Sierra?

I understood that High Sierra comes with a new file system and that this might pose a problem when working with a hard disk (none SSD)

I have a late 2009 iMac, DVD drive replaced for a SSD, which is now the system drive and 20G of memory installed. The original 1 TB hard drive is still present and used as an internal second drive.

The only reason I might want to upgrade this machine from El Capitan is because I want to start using Scrivener 3.

Scrivener 3 also works on Sierra.


1) with this late 2009 iMac should I upgrade to Sierra or High Sierra?

2) Should I upgrade from El Capitan at all?

Thanks in advance for any advice.


iMac, OS X El Capitan (10.11.6)

Posted on


Dec 17, 2017 8:15 AM in response to Keyser-Soze In response to Keyser-Soze

If you install High Sierra on a Mac that doesn't have a SSD, it will install as HFS+, so I don't see how that there would be any issues at all.

You should have a full backup of your drive before any upgrade, so I don't understand how there would be any risk involved in experimenting with it beforehand.

Dec 17, 2017 8:15 AM

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Question: iMac 2009 upgrade to Sierra or High Sierra?